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状语从句状语从句是副词性从句，它在句子中担任状语，修饰主句的动词、形容词、副词或句子。根据修饰的方面，状语从句可以分为以下九种。种类从属连词例句要点归纳时间状语从句whenWhenIcameintotheroom,hewaswritingaletter.when指的是“当…时”。从句中的动词可表延续性动作，也可表瞬间性动作※Iwaswalkingalongthestreetwhen(这时)suddenlyTompattedmeontheshoulder.when意为“这时”或“在那时”,这时when分句一般位于句末。whileWhileitwasraining,theywentout.※Allofusareworkinghardwhileheissleeping.(并列连词“然而”)while指“在某一段时间里”，“在…期间”，while引导的动作必须是持续性的。asHehurriedhome,lookingbehindashewent.他赶快回家，边走边向后看。As(随着)timegoesby,IlikeChinabetter.as（一边...一边）引导持续性动作，强调主句和从句的动作同时发生；“随着”。beforeBeapupilbeforeyoubecomeateacher.IfinishedmytaskbeforeIwenthome.before译为“在…之前,才,就”afterHearrivedafterthegamestarted.在…之后tilluntilWewaitedtill(until)hecameback.直到Shedidn’tstopworkinguntileleveno’clock.直到…才主句谓语动词为延续性，常用肯定式；主句谓语动词为瞬间性，常用否定式，可用before替换since,GreatchangeshavetakenplaceinChinasince1978.It’s8yearssinceItaughthere.其从句通常用一般过去时，主句谓语动词通常用完成时常用于Itis/was…since句型assoonasAssoonasIarriveinShanghai,I’llwritetoyou.Nosoonerhadhereachedhomethanitbegantorain“一…就”同：immediately,directly,instantly,theminute/moment,nosooner…than,hardly(scarcely)…whenthefirsttimeThefirsttimeIsawhim,hewasaschoolteacher同理：everytime,eachtime,anytime,thelasttime,bythetime可引导时间状语从句地点状语从句wherewhereverWherethereiswaterthereislife.Whereveryougo,youmustobeythelaw.where与wherever意义基本相同，但后者语气较强。inwhich只在定语从句中的某些情况下，才可以与where替换原因状语从句becauseIwaslateyesterdaybecauseIwasill.because用来回答why的问题，语气最强一般放在主句之后sinceSince(既然)everyoneishere,let’sbeginourmeeting.since表示既然或全已知的理由,稍加分析即可表明的原因,多放句首asAs（由于）hedidn’tknowmuchEnglish,helookedupthewordinthedictionary.从句常放在句首，说明次要的原因，主句说明结果，常用于口语中。forItmusthaverainedlastnight,forthegroundisstillwet.for连接的是并列句，表补充说明的原因，常位于主句后。目的状语从句sothatinorderthat①IshallwritedownyourtelephonenumbersothatImaynotforget.②Theyworkedharderinorderthattheycouldfinishtheworkaheadoftime.常用情态动词can(could)等放在从句动词之前，从句往往放在主句之后.incase,forfearthat,lestTakeyourumbrellaincase（以防，以免，唯恐）itshouldrain.引导的从句可用虚拟语气：should+动词原形；结果状语从句sothat;so…that①Weturneduptheradio,sothateveryoneheardthenews.②Hewassoexcitedthathecouldn’tsayaword.sothat前有逗号为结果状语从句。so…that的so后面跟形容词或副词.such…that①Itissuchaninterestingnovelthatallofuswanttoreadit.②Itissointerestinganovelthatallofuswanttoreadit.such…that的such后面跟名词，如果名词是单数就要用sucha/an…that还可以转换用so…that，语气较强条件状语从句ifunlessas/solongas①Difficultiesarenothingifwearenotafraidofthem.②Weshallgotheretomorrowunless除非itrains.=Weshallgotheretomorrowifitdoesn’train.Solongasyouworkhard,youwillsucceed.只要努力，你就会成功。unless从句的谓语只能用肯定式。unless和if…not同义。条件状语从句中的谓语动词的时态一般要用现在时或过去时代替一般将来时或过去将来时。once一旦onconditionthatYoumayborrowthebook,onconditionthatyoudonotlendittoanyoneelse.在……条件下，倘若……supposing假如，如果。同：supposethat,provided/providing(that)方式状语从句asasif／thoughDrawacatasItaughtyouyesterday.Shelooksasifsheisill.Heactedasif(though)nothinghadhappened.此处as译为，按照或正如asif或asthough的意义和用法基本一样。从句中可以用现在时表示可能符合事实，也可以用虚拟语气。让步状语从句thoughalthough①Although(Though)hewasoversixty,(yet)hebegantolearnFrench.②Wewerenottiredthough(although)wehadworkedallday.一般用了“虽然”就不能再用“但是”（but）,但可以与yet或still连用。though/although意义相同，后者正式多放主句的前面。evenif／thoughI’llgoevenif(though)itrainstomorrow.“即使”asChildasheis,heknowsalot.Tryashemight,hefailed.Coldasitis,(=Thoughitiscold,)thechildrenplayoutdoors.as引出的状语从句常放在句首，语序部分倒装。虽然，尽管whileWhileIfindthereareproblems,Idon’tknowwhattheyare.虽然，尽管nomatter…Doitnomatterwhatotherssay.Nomatterhowbusyhewas,hestudiedEnglisheveryday.nomatter……与wh-ever引导的让步状语从句意义一样，但前者不能引导名词性从句。wh－everWhateverhappens/mayhappen,weshallnotloseheart.Whoevercomes,hewillbeglad.比较状语从句as…asnotso/as…asMaryisasoldasmysister.Hedoesn’trunso(as)fastasJack(does).连词表示同程度级的比较，肯定句用as…as否定句可用notas(so)…asthanHeboughtfewerbooksthanI(did).主句中用比较级的形容词或副词。themore…themoreThemoreyouread,thebetteryouunderstand.Thewarmer,thebetter.越暖和越好。越…越….